CompTIA Security+ Question K-4

Which of the following is a directional antenna that can be used in point-to-point or point-to-multi­point WiFi communication systems? (Select TWO).

A. Backfire
B. Dipole
C. Omni
D. PTZ
E. Dish

Answer: A,E

Explanation:
Both the Backfire and the Dish antennae are high gain antenna types that transmit a narrow beam of signal. It can therefore be used as a point-to-point antenna over short distances, but as point-to­multi-point antenna over longer distances.

CompTIA Security+ Question E-46

An administrator needs to secure RADIUS traffic between two servers. Which of the following is the BEST solution?

A. Require IPSec with AH between the servers
B. Require the message-authenticator attribute for each message
C. Use MSCHAPv2 with MPPE instead of PAP
D. Require a long and complex shared secret for the servers

Answer: A

Explanation:
IPsec is used for a secure point-to-point connection traversing an insecure network such as the Internet. Authentication Header (AH) is a primary IPsec protocol that provides authentication of the sender’s data.

CompTIA Security+ Question B-86

Connections using point-to-point protocol authenticate using which of the following? (Select TWO).

A. RIPEMD
B. PAP
C. CHAP
D. RC4
E. Kerberos

Answer: B,C

Explanation:
B: A password authentication protocol (PAP) is an authentication protocol that uses a password. PAP is used by Point to Point Protocol to validate users before allowing them access to server resources.

C: CHAP is an authentication scheme used by Point to Point Protocol (PPP) servers to validate the identity of remote clients. CHAP periodically verifies the identity of the client by using a three-way handshake.

CompTIA Network+ Question C-45

A typical cell tower will have microwave and cellular antennas. Which of the following network topologies do these represent? (Choose two.)

A. Point-to-multipoint
B. Bus
C. Point-to-point
D. Mesh
E. Peer-peer
F. Ring

Correct Answer: CD

CompTIA Network+ Question A-79

A network topology that utilizes a central device with point-to-point connections to all other devices is which of the following?

A. Star
B. Ring
C. Mesh
D. Bus

Correct Answer: A

Explanation:
A Star network is the most common network in use today. Ethernet networks with computers connected to a switch (or a less commonly a hub) form a star network. The switch forms the central component of the star. All network devices connect to the switch. A network switch has a MAC address table which it populates with the MAC address of every device connected to the switch. When the switch receives data on one of its ports from a computer, it looks in the MAC address table to discover which port the destination computer is connected to. The switch then unicasts the data out through the port that the destination computer is connected to.

CompTIA Network+ Question A-42

A network technician has configured a point-to-point interface on a router, however, once the fiber optic cables have been run, the interface will not come up. The technician has cleaned the fiber connectors and used an optical power meter to confirm that light is passing in both directions without excessive loss. Which of the following is the MOST likely cause?

A. Distance limitation
B. Wavelength mismatch
C. cross-talk
D. EMI
E. Macro bend

Correct Answer: B

CompTIA Network+ Question A-19

A technician is troubleshooting a point-to-point fiber-optic connection. The technician is at a remote site and has no connectivity to the main site. The technician confirms the switch and the send-and-receive light levels are within acceptable range. Both fiber SFPs are confirmed as working. Which of the following should the technician use to reveal the location of the fault?

A. OTDR
B. Light meter
C. Tone generator
D. CSU/DSU

Correct Answer: A